User Manual

“Halo” System: Communication Protocol 970-00002-000
EXI Wireless Systems, Confidential Page 32 of 33 July 27, 1999
8. Glossary
Checksum A number that has been calculated as a function of some message.
CRC Cyclic Redundancy Code" or “Cyclic Redundancy Check”.
LSb Stands for “Least Significant Bit”. This is bit 0 of a given byte or a word.
MSb Stands for “Most Significant Bit”.
Message Sequence of bytes which carry information from one point to the other.
EIA-485 Balanced, multidrop, half-duplex communication protocol (former (RS-485)
EIA-232 Unbalanced, point-to-point communication protocol.(former (RS-485)
PWM Pulse Wide Modulation
BBB Bit By bit Interrogation
Maglock Door lock controlled by the magnetic coil.
RBC Remote Bypass Control
UART Universal Asynchronous Receiver and Transmitter